Size: Approximately 11.3cm x 11.3cm Purchased at a Japanese goods store. The coaster on the right was used and has tea stains. The coaster on the left is almost unused, but it has a used feel because I washed it before listing it. Please consider purchasing if you understand that it has been stored at home for a long time. The stain remained even after washing, so it is priced at the lowest possible price.